阅读说明：本技术 一种强化轮辋结构的短切碳纤维与尼龙6梯度复合材料电梯滑轮的一体化制备方法 (Integrated preparation method of short carbon fiber and nylon 6 gradient composite elevator pulley with reinforced rim structure ) 是由 张春华 刘宏鹏 张爱臣 于 2020-05-09 设计创作，主要内容包括：本发明属于滑轮生产制造技术领域,尤其为一种强化轮辋结构的短切碳纤维与尼龙6梯度复合材料电梯滑轮的一体化制备方法,所述制备方法包括以下步骤：S1、短切碳纤维与己内酰胺单体预混：在室温下,称量短切碳纤维和己内酰胺单体,将定量份的短切碳纤维和己内酰胺单体进行机械搅拌,得到预混料；S2、预混料熔融真空脱水与离心浇注：将预混料熔融真空脱水,再次搅拌之后按照常规浇注方法进行离心浇注。本发明的短切碳纤维与尼龙6梯度复合材料电梯滑轮制备方法是现有技术的改进,在制备过程中使用了短切碳纤维,通过离心浇注的方式,使得短切碳纤维在滑轮中呈梯度分布,工艺改进较小,产品性能提升明显,有效的提高了产品的稳定性以及刚性。(The invention belongs to the technical field of pulley production and manufacturing, and particularly relates to an integrated preparation method of a chopped carbon fiber and nylon 6 gradient composite elevator pulley of a reinforced rim structure, which comprises the following steps: s1, premixing the chopped carbon fibers and caprolactam monomers: weighing chopped carbon fibers and caprolactam monomers at room temperature, and mechanically stirring a certain amount of chopped carbon fibers and caprolactam monomers to obtain a premix; s2, melting and vacuum dehydrating the premix and centrifugally pouring: and melting the premix, performing vacuum dehydration, stirring again, and performing centrifugal casting according to a conventional casting method. The preparation method of the elevator pulley made of the chopped carbon fibers and the nylon 6 gradient composite material is an improvement of the prior art, the chopped carbon fibers are used in the preparation process, and are distributed in a gradient manner in the pulley in a centrifugal casting mode, so that the process improvement is small, the product performance is obviously improved, and the stability and the rigidity of the product are effectively improved.)

1. The integrated preparation method of the short carbon fiber and nylon 6 gradient composite material elevator pulley with the reinforced rim structure is characterized by comprising the following steps of: the preparation method comprises the following steps:

s1, premixing the chopped carbon fibers and caprolactam monomers: weighing chopped carbon fibers and caprolactam monomers at room temperature, and mechanically stirring a certain amount of chopped carbon fibers and caprolactam monomers to obtain a premix;

s2, melting and vacuum dehydrating the premix and centrifugally pouring: and melting the premix, performing vacuum dehydration, stirring again, and performing centrifugal casting according to a conventional casting method.

2. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 1, wherein the preparation method comprises the following steps: in the S1, the parts of the chopped carbon fibers are 0.1-5 parts, and the parts of the caprolactam monomer are 95-99.9 parts.

3. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 1, wherein the preparation method comprises the following steps: in S2, the centrifugal speed of the die is 500-1000 rpm.

4. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 1, wherein the preparation method comprises the following steps: in the step S2, the premix is melted and vacuum-dehydrated, and the rotation number of the motor is regulated and controlled when centrifugal casting is carried out after re-stirring, wherein the regulation and control times are 3 times, so that the chopped carbon fibers are subjected to gradient distribution on the rim, the spoke and the inner ring of the pulley.

5. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 4, wherein the preparation method comprises the following steps: the rim, the spoke and the wheel inner ring structure of the pulley are designed into a gradient composite material structure with the chopped carbon fibers distributed in a gradient manner from more to less.

6. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 5, wherein the preparation method comprises the following steps: the content of the chopped carbon fibers of the rim composite material is 3-5%.

7. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 5, wherein the preparation method comprises the following steps: the content of the chopped carbon fibers of the spoke composite material is 0.5-1%.

8. The integrated preparation method of the chopped carbon fiber and nylon 6 gradient composite elevator pulley for reinforcing the rim structure as claimed in claim 5, wherein the preparation method comprises the following steps: the content of the chopped carbon fibers of the wheel inner ring composite material is 0.1-0.3%.

Technical Field

The invention relates to the technical field of pulley production and manufacturing, in particular to an integrated preparation method of a chopped carbon fiber and nylon 6 gradient composite elevator pulley with a reinforced rim structure.

Background

In the elevator machinery equipment, the lightweight design and preparation technology of replacing steel with plastic has important significance for promoting the technical progress and development of elevator engineering machinery. The key structural components of the elevator equipment, namely the lightweight structural optimization design of the pulleys and the innovation of lightweight material technology are that plastic is used for replacing steel as the key direction, and the nylon pulleys are used for replacing metal steel pulleys, so that the abrasion of the pulleys on the transmission steel wire rope and the mechanical noise can be reduced. The MC nylon 6 has the advantages of small density, good mechanical property, friction resistance, easy processing and the like, and becomes a plastic material for preparing the elevator pulley.

However, compared with a metal wheel, the existing MC nylon 6 wheel has the defects of low structural rigidity, unstable service performance and the like, and according to the distribution condition of external force applied to the pulley on the wheel structure in the elevator running process, the tensile strength and the elastic modulus (deformation resistance) of the rim (rim) part of the pulley are found to be key factors influencing the overall structural performance of the pulley, so that a novel elevator pulley preparation technology for improving the structural rigidity and the performance of the nylon 6 wheel is urgently needed, and the problems of low structural rigidity and unstable service performance of the MC nylon 6 wheel are solved.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an integrated preparation method of chopped carbon fibers of a reinforced rim structure and a nylon 6 gradient composite material elevator pulley, wherein the chopped carbon fibers with high strength, high modulus and self-lubricating property are added in the preparation and forming process of an MC nylon 6 wheel, and the gradient distribution of the chopped carbon fibers from the edge of a central shaft hole to the rim from less to more through a spoke channel is controlled through the centrifugal force action in the nylon 6 centrifugal casting forming, so that the problems of low structural rigidity and unstable use performance of the MC nylon 6 wheel are solved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an integrated preparation method of a chopped carbon fiber and nylon 6 gradient composite elevator pulley of a reinforced rim structure comprises the following steps:

s1, premixing the chopped carbon fibers and caprolactam monomers: weighing chopped carbon fibers and caprolactam monomers at room temperature, and mechanically stirring a certain amount of chopped carbon fibers and caprolactam monomers to obtain a premix;

s2, melting and vacuum dehydrating the premix and centrifugally pouring: and melting the premix, performing vacuum dehydration, stirring again, and performing centrifugal casting according to a conventional casting method.

In the S1, the parts of the chopped carbon fibers are 0.1-5 parts, and the parts of the caprolactam monomers are 95-99.9 parts.

In a preferable technical scheme of the present invention, in S2, the centrifugal rotation speed of the mold is 500 to 1000 rpm.

In a preferred embodiment of the present invention, in S2, the premix is melted and vacuum dehydrated, and the number of rotations of the motor is controlled to be 3 times when the premix is stirred again and then centrifugally poured, so that the chopped carbon fibers are distributed in a gradient manner on the rim, spoke, and inner ring of the pulley.

As a preferred technical scheme of the invention, the rim, the spoke and the wheel inner ring structure of the pulley are designed into a gradient composite material structure with gradient distribution of chopped carbon fibers from more to less.

As a preferable technical scheme, the content of the chopped carbon fibers in the rim composite material is 3-5%.

As a preferable technical scheme, the content of the chopped carbon fibers of the spoke composite material is 0.5-1%.

As a preferred technical scheme, the content of the chopped carbon fibers of the composite material of the inner ring of the wheel is 0.1-0.3%.

(III) advantageous effects

Compared with the prior art, the invention provides an integrated preparation method of a chopped carbon fiber and nylon 6 gradient composite elevator pulley of a reinforced rim structure, which has the following beneficial effects:

according to the integrated preparation method of the elevator pulley made of the chopped carbon fibers and the nylon 6 gradient composite material with the reinforced rim structure, the chopped carbon fibers are used in the preparation process, and are distributed in a gradient manner in the pulley in a centrifugal pouring manner, so that the rigidity and the structural stability of each part of the pulley are effectively and hierarchically enhanced, and the method is a novel integrated preparation method of the elevator pulley; the preparation method of the elevator pulley made of the chopped carbon fiber and nylon 6 gradient composite material is an improvement of the prior art, has small process improvement, obviously improves the product performance, and effectively improves the stability and rigidity of the product.

Drawings

FIG. 1 is a schematic structural view of a chopped carbon fiber and nylon 6 gradient composite pulley of a reinforced rim structure of the present invention;

FIG. 2 is a schematic view of an end face of a pulley made of a chopped carbon fiber and nylon 6 gradient composite material and microscopic distribution of materials of the pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.